This is deserving of its own write thread (unless one already exists).After the 100th close call during the frequent snow/rain storms out here, I decided to install rear fog light. I bought the OEM stalk and was going to do a bunch of custom wiring until I heard a relay click in the dash after installing the new stalk. After some messing around and testing, I realized the truck was already prewired all the way to the rear for the fog lights. The only thing missing was the wires from the rear sonar harness and the fog lights themselves. So I ordered those 2 and installed everything. It all works as it should now.
The next step is testing to see if the bulb is installed in the cluster. Going to look at the FSM diagrams and see if grounding pin 9 on the E2 connector is the correct method for the US LX.
The camera did not capture how bright they really are.
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This is the connector for the rear sonar harness (where Frame #2 harness connects), the bottom 3 wires are for the sonar system and the top 2 are the positive and negative for the fog lights. I'm assuming if you have those top 2 wires, then your truck is prewired too.